Distance : 10M
Battery Volume : 300mAh
Charging voltage : DC5V
Loundspeaker Size : 40mm
Speaker Impedance : 32ohm
Working Time : Music 4-6H Call 8-10H
Version : 4.1
Microphone : Bult In
Power Rating : 100Mw
Working Voltage : DC3.7V
Frequency Responce : 20-20KHz